I am using Xubuntu and I need to keep document A with font size 8 and B with with font size 12. If I save A with font size 8, this switches the font size to 8 for all the other documents, including B. Again, if I open B, turn the font to 12 and save the document this switches A too to 12, and so on. This is rather boring. Somebody could tell me how to fix this problem?
Edit: I am using the plain text editor of Xubuntu.